ClassNotFound `org/simmetrics/StringMetrics`

[BlackHart98]

I am trying to use GumTree for an AST diff in my DSL, I use Rascal MPL to generate the XML (GumTreeNode), But I get this error when I try to call the matcher:

If needed I will provide the GitHub repository so you could look at it, thanks. Your input will be appreciated

[!Note] I am Using the GumTree API but it doesn't seem to be sufficient, my guess is I am probably doing something wrong.

[BlackHart98]

Here is the link to the repository: ast_diff

[jrfaller]

Hello! Strange bug since normally Simmetrics is in the dependency list. You are using GumTree using maven? Cheers

[jrfaller]

Try a dependency to gumtree-core and bump version to 4.0.0-beta1

[BlackHart98]

Ok, I will do that right away

[BlackHart98]

Like so?

<dependency>
      <groupId>com.github.gumtreediff</groupId>
      <artifactId>gumtree-core</artifactId>
      <version>4.0.0-beta1</version>
    </dependency>

Did that and got Missing artifact com.github.gumtreediff:gumtree-core:jar:4.0.0-beta1

[jrfaller]

https://central.sonatype.com/artifact/com.github.gumtreediff/core

[BlackHart98]

Done, this version doesn't seem to be compatible with my Java Version, correct me if I am wrong but it works for java 17+, right?

Java("UnsupportedClassVersionError","com/github/gumtreediff/io/TreeIoUtils has been compiled by a more recent version of the Java Runtime (class file version 61.0), this version of the Java Runtime only recognizes class file versions up to 55.0")

Rascal works well for Java 11

[jrfaller]

Ow right. Ok try to downgrade the core version it should work: https://central.sonatype.com/artifact/com.github.gumtreediff/core/3.0.0 (however it would be great to be able to use 4.0.0)

[BlackHart98]

That was the version I had before, it complains about dependencies:

[BlackHart98]

Is there a way I could use the GumTree jar together with some commands and parse my generated XML (GumTree): Like so; java -jar gumtreediff.jar -diff <t1> <t2>

The command above is made up just to illustrate what I have in mind t1 and t2 are GumTrees (XML files)

[BlackHart98]

So, I was able to get Rascal to work with Java 17, but I hit a new wall, the error:

Cannot invoke "com.github.gumtreediff.utils.Registry$Factory.instantiate(Object[])" because "this.defaultMatcherFactory" is null

any idea why this is the case?

[jrfaller]

ok and this is with GumTree 4.0.0-beta1 right ?

[jrfaller]

Hi!

Did you manage to get it working?

[BlackHart98]

I was able to get the 4.0.0-beta1 to work via a workaround but a version that works with Java 8 would have been more suitable/convenient

[jrfaller]

Nice! Sorry but our policy is to maintain Java last LTS 😢

Cheers.